Timing device.



G. R. MOORE.

TIMING DEVICE.

APPLICATION FILED NOV. 27, 1912.

1,07 ,05 Patented N0v.11,1913.

WITNESSES: INVENTOR.

g 8W ATTORN Y.

COLUMBIA PLANOGRAPH CO, WASHINGTON, u. c.

CHARLES R. MOORE, OF LA FAYETTE, INDIANA.

TIMING DEVICE.

Specification of Letters Patent.

Patented Nov. 11, 1913.

Application filed November 27, 1912. Serial No. 733,817.

To all whom it may concern:

Be it known that 1, CHARLES R. Moonn, citizen of the United States,residing at La Fayette, in the county of Tippecanoe and State ofIndiana, have invented a certain new and useful Improvement in T imingDevices, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention has for its direct object the formation of an improvedtiming device or clock though features are included which are not to belimited to their use in connection with timing devices. When theinvention is embodied in a timing device it is employed as a motionmaintaining apparatus to maintain the oscillation of a timing pendulumand the invention when thus embodied may be generally described asincluding an oscillating pendulum, a magnet for pulling the same towardthe vertical, a second magnet differential with respect to the first andmeans for bringing the two magnets in magnetic opposition when thependulum is at vertical to permit it to continue its swing in thedirection in which it was initially drawn by the first magnet, suchoperations desirably accompanying the movement of the pendulum in eachof its directions. In the preferred embodiment of the invention one ofthe differentially related magnets is preferably in the form of apermanent horseshoe magnet and the other of these magnets is desirablyan electromagnet in which case the permanent magnet is preferablyswingingly mounted so that in addition to magnetically attracting anarmature carried by the pendulum it will also be turned as a consequenceof such attraction when the pendulum approximates the vertical thereuponto operate a switch for closing the circuit of the electro-magnetsufficiently to counteract the tractive effect of the permanent magnetupon the pendulum armature to permit the pendulum to swing in thedirection in which it was previously pulled by. the permanent magnetbeyond the Vertical to the other limit of its stroke, this magnetcircuit being opened when the pendulum is swung sufficiently beyond thevertical so that the permanent magnet may again pull upon the armatureprovided upon the pendulum to reverse the pendulum motion. I

I will explain my invention more fully by reference to the accompanyingdrawing showing the preferred embodiment thereof as employed inconnection with a timing device and in which drawing Figure 1 is a sideelevation of the apparatus, a portion of the pendulum being broken away;Fig. 2 is a side view of the structure shown in Fig. 1; Fig. 3 is asectional elevation of a part of the structure shown in Fig. 1 taken ona plane which includes the axes of electro-magnetic coils; and Fig. 4 isa diagrammatic view illustrating a circuit which may be employed.

Like parts are indicated by similar charactors of reference throughoutthe different figures.

The pendulum 1 is swingingly mounted at its upper end in any usual orpreferred way and carries at its lower end a pendulum bob 2, it beingunderstood that the pendulum is in driving relation with either a timingelectrical contact or a gear train in actuating relation with anysuitable timing indicating device such, for example, as clock hands. Thependulum bobs are usually made of non-magnetic metal and in such event asoft iron armature 3 is carried by the pendulum and in effect forms apart of the pendulum and its bob. A magnet (desirably a horizontallydisposed permanent magnet) 4 is pivotally mounted at 5 upon one side ofthe vertical line that includes the point or axis about which thependulum oscillates, the poles of this magnet intercepting such verticalline. The polar ends of the magnet 4 preferably have magnetic attractionfor the armature 3 through the intermediation of upright soft iron polarextensions 6 each evenly distributed upon both sides of the verticalline including the axis of oscillation of the pendulum, whereby tl ependulum armature 3 is attracted by the permanent magnet with equalforce in both directions of swinging movement of the armature. Therelationship of the pendulum armature and permanent magnet is such thatthe permanent magnet will not move upon its pivot 5 until the pendulumhas sufficiently approached its vertical posi tion or that positionwhere the attraction of the permanent magnet for the armature is to besufficiently decreased to permit the pendulum properly to continue itsmovement. l l hen the pendulum has thus suf ficiently neared itsvertical position in either of its directions of movement the permanentmagnet 4 is swung u wardly upon its pivot 5 to bring the switch contact7 carried by the magnet into en agement with a contact 8. The contacts 7and 8 constitute the terminals of circuit which includes the battery orother suitable source of current 9 and a winding subdivided into twocoils 10, each coil surrounding a soft iron polar extension 6 and beingillustrated as moving with the permanent magnet but which characteristicmay obviously be modified. When this circuit is closed the magnet 10serves suliiciently to demagnetize the polar extensions 6 suthciently toreduce the magnetic attraction between these polar extensions and thearmature to permit the pendulum to continue in movement. Itcounterweight 11 is so selected or adjusted that the permanent magnetmay remain elevated during a ncc essary portion of the movement of tl ependulum properly to permit the continuation of the pendulum movementbeyond the vertical, a result which is accomplished by so adjusting thedir'lerential relation of the magnets i and 10 that the polar extensions6 are not entirely demagnetized to permit the polar extensions 6 to keeppart of their hold upon the armai'zure 3 until the pendulum has swungsulliciently beyond the vortical whereupon the magnet ill resume itshorizontal position, being ii. i. ed in its return movement by a stop 19When the magnet has resumed its horizontal position the circuit for theelectro-magnet 10 is open at 78 so that the magnet t may in pull uponthe armature 8 to rd the progress of the pendulum towarc the limit ofits stroire, it this action be desired, and cause its return movement. Asecondary clock 13 may be included in the circuit of magnet 10.

he magnet i is shown as being made of hard steel that has leen subjectedto the magnetizing influence a coil so as to be permanently magnetizedwithout the continuing presence of a magnetiz ig coil. 1 do not wish tobe limited, however, to a magnet formed of hard steel thus permanentlymagnetized and which lacks a constantly energized ccil for impartingmagnetization permanently to the magnet. it therefore use the termpermanent magnet in the broad sense of a permanently or constantlymagnetized bar or body irrespective of the method employed for impartingthe permanent ma gn eti .1: ation.

ll hile l: have ierein shown and particularly described the preferredembodiment of my invention 1 do not wish to be limited to the precisedetails of construction shown as changes may readily be made without departing from the spirit of my invention, but

Having thus described my invention I claim new and desire to secure byLetters Patent the following l. A motion maintaining apparatus includina pendulum; an armature carried by the pendulum; a swingingly mountedpermanent magnet provided with a soft iron polar extension or extensionsthat cooperate with the ar nature to pull the pendulum; an electro-magnet winding in partial demagnet izing relation with said polarextension or extensions; and an energizing circuit including theelectro-magnet winding and a switch which is operated by the permanentmagnet to close the circuit when the permanent magnet is moved at itsportion where the electro-magnet winding is provided, upon thesuiliciently close approach of the armature toward the permanent magnetsufficie tly to reduce the pull of the permanent iet upon the pendulumarmature during a limited portion of the pendulum motion whereby thependulum may continue in the direction in which it is pulled by thepermanent magnet.

2. A motion maintaining apparatus including a pendulum; an armaturecarried by the pendulum; a swingingly mounted pernmnent magnetcooperating with the ar nature to pull the pendulum; an electro magnetwinding in diitliercntial relation with the permanent magnet; and anenergizing circuit including the electrounagnet winding and a switchwhich operated by the permanent magnet to close the circuit when thepermanent magnet is moved at its portion where the electro-magnetwinding is provided, upon the sufficiently close approach oi thearmature toward the permanent magnet sul'liciently to reduce the pull ofthe i'ermanent magnet upon the pendulum armature during a limitedportion of the pendulum motion whereby the pendulum may continue in thedirection in which it is pulled by the permanent magnet.

3. A motion maintaining apparatus including a pendulum; an armaturecarried by the pendulum; two differentially related magnets, onecooperating with the armature to pull the pendulum and the other, whichis an electro-magnot, serving to counteract the ell'ect the first toreduce the pull upon the armature during a limited portion of thependulum motion, the magnet that pulls the armature being movablymounted; and an energizing circuit for the electro-magnet which includesa switch which is closed by the movably mounted magnet when moved uponthe suiiiciently close approach of the armature thereto.

l. A motion maintaining apparatus ineluding a pendulum; an armaturecarried for the electro-magnet which includes a switch which is closedby the pendulum pulling magnet in cooperation with the pendulum when ithas approached the pulling magnet sufiiciently close.

5. A motion maintaining apparatus including a pendulum; an armaturecarried by the pendulum; two diflerentially related magnets, onecooperating with the armature to pull the pendulum and the other, whichis an electro-magnet, serving to counteract the eifect of the first toreduce the pull upon the armature during a limited portion of thependulum motion; and an energizing circuit for the electro-magnet whichincludes a switch governed by the pendulum and closed thereby when ithas sufliciently approached the pendulum pulling magnet.

6. A motion maintaining apparatus including a pendulum; an armaturecarried by the pendulum; two differentially related magnets, onecooperating with the armature to pull the pendulum and the other servingto counteract the effect of the first to reduce the pull upon thearmature during a limited portion of the pendulum motion; and meansgoverned by the pendulum for bringing the counteracting magnet intoservice when the pendulum has sufliciently approached the pendulumpulling magnet.

7. A motion maintaining apparatus including an armature; a magnet forand in moving relation to the armature for effecting operation of themotor; a second magnet, which is an electro-magnet, in differentialrelation to the first; and an energizing circuit for the electro-magnetincluding a switch governed by the first magnet and its armature andclosed when the first magnet and its armature have been brought intosufliciently close proximity.

8. A motion maintaining apparatus including an armature; a magnet forand in moving relation to the armature; a second magnet, which is anelectro-magnet, in differential relation to the first; and an energizingcircuit for the electro-magnet including a switch which is closed by themotion maintaining apparatus when the first magnet and its armature havebeen brought into sufiiciently close proximity.

9. A motion maintaining apparatus including an armature; a magnet forand in moving relation to the armature; a second magnet in differentialrelation to the first; and means governed by the motion maintainingapparatus for bringing the second magnet into action when the firstmagnet and its armature have been brought into sufiiciently closeproximity.

10. A motion maintaining apparatus including an armature; a permanentmagnet for and in moving relation to the armature; a second magnet,which is an electro-mag net, in differential relation to the first; andan energizing circuit for the electro-magnet including a switch governedby the first magnet and its armature and closed when the first magnetand its armature have been brought into sufliciently close proximity.

11. A motion maintaining apparatus including an armature; a permanentmagnet for and in moving relation to the armature; a second magnet,which is an electro-magnet, in differential relation to the first; andan energizing circuit for the electro-magnet including a switch which isclosed by the motion maintaining apparatus when the first magnet and itsarmature have been brought into sufiiciently close proximity.

12. A motion maintaining apparatus including an armature; a permanentmagnet for and in moving relation to the armature; a second magnet indifferential relation to the first; and means governed by the motionmaintaining apparatus for bringing the second magnet into action whenthe first magnet and its armature have been brought into sufficientlyclose proximity.

In witness whereof, I hereunto subscribe my name this 25 day of Nov. A.D. 1912.

CHAS. R. MOORE.

Witnesses:

lV. F. MILLER, B. D. MoCoNNELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

